福州大学学报（自然科学版）2018，Vol.46Issue(3)：396-402,7.DOI:10.7631/issn.1000-2243.17365
界面剂对新旧混凝土界面粘结性能影响的试验研究
Effect test of interface agent on bonding of old and new concrete
摘要
Abstract
Direct shear experiments of 5 groups of Z-shape adhesive specimens without and with inter-face agent ( including cement paste, cement paste with 10% fly ash, cement paste with 10% U-type expansion agent and cement paste with 10% styrene butadiene rubber emulsion ) were carried out to test the bonding strength between old and new concrete. In addition, micro hardness, microstructure and hydration products of interfacial transition zone ( ITZ) were analyzed by micro hardness test and SEM observation. The results show that old and new concrete interface is a weak area, interface agent can increase the bonding strength of the interface by optimizing pore structure, increasing mechanical bite action at the microscopic level and improving the interface compactness. The cost-performance ratios of cement paste and cement paste with UEA are relatively high among four typical interface agents.关键词
新旧混凝土界面/界面剂/显微硬度/微观结构/粘结机理Key words
old and new concert interface/interface agent/micro hardness/microstructure/bonding mechanism分类
建筑与水利引用本文复制引用
黄璐,卓卫东,谷音,上官萍,黄新艺..界面剂对新旧混凝土界面粘结性能影响的试验研究[J].福州大学学报（自然科学版）,2018,46(3):396-402,7.基金项目
国家自然科学基金资助项目(51578157) （51578157）
厦门市建设与管理局科技资助项目(2014-2-8) （2014-2-8）
